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Lateral Excitation Shaker Stand

Input Lateral Force | Model 2050A

stp 2050a lateral excitation shaker stand product 1The Lateral Excitation Shaker Stand Model 2050A provides a versatile means of adapting a modal shaker for horizontal input. Automobiles, aircraft, space structures, and civil structures often require a means of inputting lateral force. The stand facilitates excitation with a tensioned “piano wire” stinger (optional accessory) which significantly reduces force measurement errors from unmeasured transverse forces. Combining both lateral and vertical excitation more evenly distributes input energy for better signal to noise levels, and helps to excite uncoupled lateral structural modes. The shaker location can now be precisely adjusted in both the horizontal and vertical directions.

CE| UKCA

Highlights

  • Ensures proper shaker alignment with coarse and fine vertical adjustment
  • Optimizes stinger length with horizontal adjustment
  • Decouples shaker motion from dynamics of stand
  • Reduces force sensor measurement error with “piano wire” stinger

Applications

  • Experimental modal analysis
  • Automotive body-in-white testing
  • Structural testing of aerospace and automotive sub-assemblies

Lateral excitation is important when testing large structures or ones in which the transverse modes are highly uncoupled. In either case it is desirable to implement multiple inputs. A vertical input and the addition of a well chosen point for a lateral or skewed input can usually provide sufficient input energy and excite all the modes in a desired frequency range. The 2050A stand provides the ideal support and adjustment for such a configuration, typically using 25 lbf to 100 lbf modal shakers. The resulting input force of two or more shakers provides a broader distribution of the total input energy and helps to ensure adequate signal levels at all measurement points.